Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 746)

718 Multi-Service IronWare Routing Configuration Guide
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Configuring IPv6 specific address family route parameters
Route redistribution from other sources into IPv6 IS-IS is disabled by default. When you enable
redistribution, the device redistributes routes only into Level 2 by default. You can specify Level 1
only, Level 2 only, or Level 1 and Level 2 when you enable redistribution.
The device automatically redistributes Level-1 routes into Level-2 routes. Thus, you do not need to
enable this type of redistribution. You also can enable redistribution of Level-2 routes into Level-1
routes.
The device attempts to use the redistributed route’s metric as the route’s IPv6 IS-IS metric. For
example, if an OSPFv3 route has an OSPF cost of 20, the device uses 20 as the route’s IPv6 IS-IS
metric. The device uses the redistributed route’s metric as the IPv6 IS-IS metric unless the route
does not a have a valid metric. In this case, the device assigns the default metric value to the route.
For information about the default metric, refer to the “Changing the Default Redistribution Metric”
section, which follows this section.
Changing the default redistribution metric
When IPv6 IS-IS redistributes a route from another route source (such as OSPFv3, BGP4+, or a
static IPv6 route) into IPv6 IS-IS, it uses the route’s metric value as its metric when the metric is not
modified by a route map or metric parameter and the default redistribution metric is set to its
default value of 0. You can change the default metric to a value from 0 – 65535.
NOTE
The implementation of IS-IS does not support the optional metric types Delay, Expense, or Error.
For example, to change the default metric to 20, enter the following command at the IPv6 IS-IS
unicast address family configuration level.
Brocade(config-isis-router-ipv6u)# default-metric 20
Syntax: [no] default-metric number
The number parameter specifies the default metric. You can specify a value from 0 – 65535. The
default is 0.
The restore the default value for the default metric, enter the no form of this command.
Globally change the default redistribution metric
The default-link-metric command allows you to change the metric value globally for all the
active ISIS interfaces using one command. You can still configure the interface level metric. If ISIS
metric is configured on the interface, it will take the precedence over the global configuration.
Configuration steps
1. Configure router ISIS using the router isis command.
2. Go to the appropriate address-family using address-family [ipv4/ipv6] unicast
command.
3. Configure default metric using default-link-metric command.